Abstract

This thesis reports the results of computer simulation of a hybrid-ventilated building using ESP-r (Environmental Systems Performance for research). A newly constructed school building in Norway was used for this simulation study. The research attempted to verify the use of ESP-r for the simulation of a real building that utilizes hybrid ventilation technologies. The simulations and their analysis focus on the building's thermal interactions and ventilation performance. The model building has been simulated in three different categories of ESP-r: "building thermal simulation", "airflow simulation", and "building + airflow integrated simulation". Measured weather data were used to define the outdoor conditions of the building. It covers a representative heating period and constitutes of time-series of minutely measured values of air temperature, solar radiations, wind speed, and wind direction. In addition, for validation purpose some measured parameters of indoor environment, such as room temperature, were compared to predicted values by ESP-r. This thesis concludes that modeling of hybrid ventilation systems is now possible by ESP-r's integral approach and the resultant outputs are feasible and practical in terms of both thermal and ventilation point of view, but at the same time limitations do exist when it attempts to model really complicated building systems or to model CO 2 based control systems.